$1 $2

attr(,“class”) [1] “list” “ggarrange” $1 $2

attr(,“class”) [1] “list” “ggarrange” $1 $2

attr(,“class”) [1] “list” “ggarrange” $1 $2

attr(,“class”) [1] “list” “ggarrange” $1 $2

attr(,“class”) [1] “list” “ggarrange” $1 $2

attr(,“class”) [1] “list” “ggarrange” $1 $2 attr(,“class”) [1] “list” “ggarrange”